Design name
All designs that Database Designer creates must have a name that you specify.
All designs that Database Designer creates must have a name that you specify. The design name must be alphanumeric or underscore (_) characters, and can be no more than 32 characters long. (Administrative Tools and Management Console limit the design name to 16 characters.)
The design name becomes part of the files that Database Designer generates, including the deployment script, allowing the files to be easily associated with a particular Database Designer run.